Fix build problem in Win.

src/runtime.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1365 matching lines @@
   // algorithm is unnecessary overhead.
   if (pattern_length == 1) {
     AssertNoAllocation no_heap_allocation;  // ensure vectors stay valid
     if (sub_shape.IsAsciiRepresentation()) {
       uc16 pchar = pat->Get(pat_shape, 0);
       if (pchar > String::kMaxAsciiCharCode) {
         return -1;
       }
       Vector<const char> ascii_vector =
         sub->ToAsciiVector().SubVector(start_index, subject_length);
-      void* pos = memchr(ascii_vector.start(),
-                         static_cast<const char>(pchar),
-                         static_cast<size_t>(ascii_vector.length()));
+      const void* pos = memchr(ascii_vector.start(),
+                               static_cast<const char>(pchar),
+                               static_cast<size_t>(ascii_vector.length()));
       if (pos == NULL) {
         return -1;
       }
-      return reinterpret_cast<char*>(pos) - ascii_vector.start() + start_index;
+      return reinterpret_cast<const char*>(pos) - ascii_vector.start()
+          + start_index;
     }
     return SingleCharIndexOf(sub->ToUC16Vector(),
                              pat->Get(pat_shape, 0),
                              start_index);
   }
 
   if (!pat->IsFlat(pat_shape)) {
     FlattenString(pat);
     pat_shape = StringShape(*pat);
     sub_shape = StringShape(*sub);
@@ skipping 4504 matching lines @@
   } else {
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     Counters::gc_last_resort_from_js.Increment();
     Heap::CollectAllGarbage();
   }
 }
 
 
 } }  // namespace v8::internal